Averages of daily data. Copyright, 2016, Moody's Investor Services. Reprinted with permission. Moody's tries to include bonds with remaining maturities as close as possible to 30 years. Moody's drops bonds if the remaining life falls below 20 years, if the bond is susceptible to redemption, or if the rating changes.

Averages of daily data. Copyright, 2016, Moody's Investor Services. Reprinted with permission. Moody's tries to include bonds with remaining maturities as close as possible to 30 years. Moody's drops bonds if the remaining life falls below 20 years, if the bond is susceptible to redemption, or if the rating changes.

2016-10-04

2017-03-21

These instruments are based on bonds with maturities 20 years and above.